Home / 12,718.51-19,071.10-5,321.59

Finding the Fourth Proportional to 12,718.51, 19,071.10 and 5,321.59

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Solution

The fourth proportional to 12,718.51, 19,071.10 and 5,321.59 is: 7,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,718.51 : 19,071.10 = 5,321.59 : x
  2. Step 2: Convert to fraction form
    12,718.51/19,071.10 = 5,321.59/x
  3. Step 3: Cross multiply
    12,718.51x = 19,071.10 × 5,321.59
  4. Step 4: Simplify right side
    12,718.51x = 101,488,575.05
  5. Step 5: Solve for x
    x = 101,488,575.05/12,718.51
  6. Step 6: Final answer
    x = 7,979.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.